.middle > div {
    border: 1px solid red;
}

.middle > div > div:nth-child(1) {
    border-bottom: 1px solid red;
}

.middle > div > div:nth-child(2) > div:nth-child(1) {
    display: flex;
    justify-content: center;
}

.middle > div > div:nth-child(2) > div:nth-child(1) > div {
    text-align: center;

}

.middle > div > div:nth-child(2) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) {
    display: flex;
    justify-content: center;
    margin: 50px 0 0 0;
}

.middle > div > div:nth-child(2) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) {
    color: rgb(230, 145, 55);
}

.middle > div > div:nth-child(2) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) > div:nth-child(2) {
    color: gray;
}

/*------------------liuyan-------------------*/
.content {
    display: flex;
    justify-content: center;
}

.content > div > div > div {
    /*border: 1px solid red;*/
    line-height: 30px;
    height: 30px;
}

.content > div > div > div:nth-child(2) {
    width: 600px;
    padding: 0 20px;

    background-color: rgb(238, 238, 238);
    border: 1px dashed gray;

}

.content > div > div:nth-child(3) > div:nth-child(2) {
    height: 100px;
    line-height: 20px;
}
.content>div>div:last-child{
    display: flex;
    justify-content: center;
    margin: 30px;
}
.content>div>div:last-child>div{
    background-color: rgb(230, 145, 55);
    color: white;
    padding: 5px 40px;
    cursor: pointer;
    border-radius: 45px;
    box-shadow: 5px 5px 5px 5px red;
}